Two-stroke engine

Details Two-stroke engine Two-stroke engine

1997-09-19

1999-03-23

McMahon, Marguerite

Internal-combustion engines

Two-cycle

Pump and cylinder coaxial

123533, 123 557, F02B 3310

Patent

active

058845909

ABSTRACT:
An oscillating lever arm engine includes rigidly connected opposing pistons moved by a single lever connected to a rotating crankshaft. When applied to a two-cycle internal combustion engine, one piston may function as a pump piston and the second piston as a working piston which delivers power to the crankshaft through a connecting rod. When the pump piston is chosen to be of larger diameter, the volumetric efficiency of drawing in and providing the intake charge to the working piston may be increased. Furthermore, when poppet-type exhaust valves are used, valve timing may be selected so that the exhaust valves close before the cylinder wall transfer ports to achieve a supercharging effect.

REFERENCES:
patent: 3981280 (1976-09-01), Franke
patent: 4138972 (1979-02-01), Wilson
patent: 4185597 (1980-01-01), Cinquegrani
patent: 4745886 (1988-05-01), Yang
patent: 5694891 (1997-12-01), Liebich
patent: 5791303 (1998-08-01), Skripov

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